iphone Programming Glossary: quat.z
Using quaternion instead of roll, pitch and yaw to track device motion http://stackoverflow.com/questions/19239482/using-quaternion-instead-of-roll-pitch-and-yaw-to-track-device-motion quat self.motionManager.deviceMotion.attitude.quaternion myRoll radiansToDegrees atan2 2 quat.y quat.w quat.x quat.z 1 2 quat.y quat.y 2 quat.z quat.z myPitch radiansToDegrees atan2 2 quat.x quat.w quat.y quat.z 1 2 quat.x quat.x 2 quat.z.. myRoll radiansToDegrees atan2 2 quat.y quat.w quat.x quat.z 1 2 quat.y quat.y 2 quat.z quat.z myPitch radiansToDegrees atan2 2 quat.x quat.w quat.y quat.z 1 2 quat.x quat.x 2 quat.z quat.z myYaw radiansToDegrees.. myRoll radiansToDegrees atan2 2 quat.y quat.w quat.x quat.z 1 2 quat.y quat.y 2 quat.z quat.z myPitch radiansToDegrees atan2 2 quat.x quat.w quat.y quat.z 1 2 quat.x quat.x 2 quat.z quat.z myYaw radiansToDegrees 2..
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